A186672 Total number of n-digit numbers requiring 13 positive biquadrates in their representation as sum of biquadrates.

0, 6, 60, 640, 6239, 60228, 600196, 6000213, 60000231, 600000239, 6000000240, 60000000224, 600000000198

Offset

1,2

Comments

A102831(n) + A186650(n) + A186652(n) + A186654(n) + A186656(n) + A186658(n) + A186660(n) + A186662(n) + A186664(n) + A186666(n) + A186668(n) + A186670(n) + a(n) + A186674(n) + A186676(n) + A186678(n) + A186681(n) + A186683(n) + A186685(n) = A052268(n), for n>1.

Links

Table of n, a(n) for n=1..13.

Eric Weisstein's World of Mathematics, Waring's Problem.

Formula

a(n) = A186671(n) - A186671(n-1).

Crossrefs

Cf. A046044, A186671.

Sequence in context: A186676 A322441 A186674 * A295503 A106259 A085364

Adjacent sequences: A186669 A186670 A186671 * A186673 A186674 A186675

Keyword

nonn,base,more

Author

Martin Renner, Feb 25 2011

Extensions

a(5)-a(11) from Giovanni Resta, Apr 29 2016

a(12)-a(13) from Martin Fuller, Jan 13 2026

Status

approved